Power transmission tower



FIG. 1 is a perspective view of a power transmission tower showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The portions illustrated by broken lines relate to environmental structure that does not form part of the claimed design. 

CLAIM The ornamental design for a power transmission tower, as shown and described. 